diff --git a/files/interfaces-troisdorf7.j2 b/files/interfaces-troisdorf7.j2
index 214e566..144c3f0 100644
--- a/files/interfaces-troisdorf7.j2
+++ b/files/interfaces-troisdorf7.j2
@@ -26,7 +26,7 @@ iface {{ sn_interface_name }} inet static
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j MASQUERADE
 #auto 6to4
 #        iface 6to4 inet6 6to4
-#        local 212.83.154.70
+#        local 93.241.53.100
 
 # GRE Tunnel zum Rheinland Backbone
 # - Die Konfigurationsdaten werden vom Rheinland Backbone vergeben und zugewiesen
@@ -36,7 +36,7 @@ auto gre-bb-a.ak.ber
 iface gre-bb-a.ak.ber inet static
         address 100.64.6.25
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 212.83.154.70 remote 185.66.195.0 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 93.241.53.100 remote 185.66.195.0 ttl 255
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j SNAT --to-source 185.66.193.107
         post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --set-mss 1312
         post-up ip link set $IFACE mtu 1400
@@ -53,7 +53,7 @@ auto gre-bb-b.ak.ber
 iface gre-bb-b.ak.ber inet static
         address 100.64.6.31
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 212.83.154.70 remote 185.66.195.1 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 93.241.53.100 remote 185.66.195.1 ttl 255
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j SNAT --to-source 185.66.193.107
         post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --set-mss 1312
         post-up ip link set $IFACE mtu 1400
@@ -71,7 +71,7 @@ auto gre-bb-a.ix.dus
 iface gre-bb-a.ix.dus inet static
         address 100.64.6.29
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 212.83.154.70 remote 185.66.193.0 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 93.241.53.100 remote 185.66.193.0 ttl 255
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j SNAT --to-source 185.66.193.107
         post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --set-mss 1312
         post-up ip link set $IFACE mtu 1400
@@ -89,7 +89,7 @@ auto gre-bb-b.ix.dus
 iface gre-bb-b.ix.dus inet static
         address 100.64.6.35
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 212.83.154.70 remote 185.66.193.1 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 93.241.53.100 remote 185.66.193.1 ttl 255
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j SNAT --to-source 185.66.193.107
         post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --set-mss 1312
         post-up ip link set $IFACE mtu 1400
@@ -106,7 +106,7 @@ auto gre-bb-a.fra3.f
 iface gre-bb-a.fra3.f inet static
         address 100.64.6.27
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 212.83.154.70 remote 185.66.194.0 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 93.241.53.100 remote 185.66.194.0 ttl 255
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j SNAT --to-source 185.66.193.107
         post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --set-mss 1312
         post-up ip link set $IFACE mtu 1400
@@ -124,7 +124,7 @@ auto gre-bb-b.fra3.f
 iface gre-bb-b.fra3.f inet static
         address 100.64.6.33
         netmask 255.255.255.254
-        pre-up ip tunnel add $IFACE mode gre local 212.83.154.70 remote 185.66.194.1 ttl 255
+        pre-up ip tunnel add $IFACE mode gre local 93.241.53.100 remote 185.66.194.1 ttl 255
         post-up iptables -t nat -A POSTROUTING -o $IFACE -j SNAT --to-source 185.66.193.107
         post-up iptables -t mangle -A POSTROUTING -p tcp --tcp-flags SYN,RST SYN -o $IFACE -j TCPMSS --set-mss 1312
         post-up ip link set $IFACE mtu 1400